Improvement in coal-stoves



m. 39,535. PATBNTED AUG. 11, 1863. J. G. TREADWELLK: W. HAILES GOAL STOVE.

2 SHEETS-SHEET 1,

Wne ave \r; I I lirenfo 7J PATENTED AUG 11, 1863. J. G. TREADWELLG; W. HAILES. (JO-AL STOVE.

2 SHEETS-SHEET 1.

TED ST S PATENT OFFICE H JOHN TREADWEL AND WILLIAM HAILEs LBANY, Y.;@ AssiGN-' on-s rro MARTIN L, MEAD, ANDWILLIAM HAILES, or sAMn- PLACE-.1

" IM PQQVEME T N,o-o usTovEs Spcci fication'forming part of Letters PatentNo. 39,535, dated August 11, 1863. i

To, aZZ'toZwin it my concern} v Be it kHOWDJJlIal'J-WQ JOHN Gr. TREADWELL 'andWIL AM Harms-both of Albany,in the, county of .Albany and State of New York,

have invented a newand useful Improvement in BaseJSurning ReservoiriStoves; and We do,.hereby declare that the following is-a full, clear, and exact description of the same, ref erence being had to the accompanying drawings, forming-part of this specification, in

.1 if. 1 1 ,1 I Figure 1 is a vertical longitudinal section of a, stove patented by us at-previous-dates', with our improvements of the present date applied tot-it Fig. 2 is {a perspective View of the "fire:-

first, in the construction of an illumination window or windows at onehor more points in the continuous flame-expansion chamber. or channel, whichis about the base of the coalsupp'ly reservoir and the t0p of;,.the coa1-burnin g. fire-pot, in combination with a descending fiue'which leadstoachamber about thebase of the" s'toveandzfrom such'chamber, into a chimney-flue. p I

Itlconsists, second, inithe construction of a damper-draft flue in the continuous flame-expansion chamber or' channel, located asjust stated, in combination with a-descending flue which firstleads "down into a chamber about the base'ofthe stove, and then into the chimhey-fine, withwhich the damper-draft flueconnects dire'ctly at the top of the fire-pot. i

s It consists, third, inthe construction-of the throat of the fuel-supply cham'berof two rings ofsegmen-to'r angular :form in their cross-sec not and of fire-proof material fitted: between thei'rings, all in such manner thatthe throat of the reservoir is supported on the interior of thestove and-forms a continuation of the firepot,and'still not be afixturee so far as'bolts or otherfastenings which will not yield to exlive coals which are liable to fly out upon the floor when the poker is moved back and forth are conduoted' down into the ashpit.

It consists, fifth, in the adaptationfof aportable grate with inclinedtop, a box-fram'aand legs and a handle, for use in combination with base-burning reservoirstoves, whereby the starting of the fire in such stoves, although the supply-reseryoir may be chargemjis' rendered avery convenientand ready matter.

[It consists, sixth, in providing the as'h =pan with apertures inits circumferenceat opposite points, so that the'poker maybe inserted through these'holesandthe pan carried out with hot ashes in it, without liability of burn ing the hands.

To, enable Others miles it sit at re ake and useour invention, we will proceed scribethe'same with reference to the draw on the'date heretofore mentioned pwe do not deem it necessary to describe-here anything more than those parts which we regard asessential changes and improvements ,on the stove described in said patent.

p Our first im provement lscarr ed in to practice bycasting the fire-potAwi th arectangnlar elliptical or circular extension, at, atone or more fire-pot, asat b, and cast the" enlargement c on the part D, which forms-theexpansion flame-passage E, as shown. In any casethe illuminationwvindow must be constructed so as to confine the flame andgases atthis point withintheflame chamber E. a ,l 'f

( Our second improvement is carried into practice by casting in like manner anenlargemerit of propenform to makea branch flue, F

As'the I main features of ourpresent stove are shown: in the Letters Patent granted to' us on the upper elge ofthe fire-pot or on the lower edge of the part D, as represented.

Thisbranchflue'we run into the smoke pipe or draft-flue G, and in order to open and close it at will, wehave arranged within its damper or valve, I, which has its rod by which it has turned extended to the outside of the casing of the stove. By opening the damper a direct draft is obtained, and the fire can be kindled very speedily, and the draft does not have to pass up through the body of coal in the reservoir, as in our patented stove. When the damper is closed, the highly-ignited gases pass down the descending fines J 'J as in our ,former patent. -We will here state that we have slightly modified the base of our stove by increasing the depth of theash-pit K, anddispensing with a chamber or space under- .neath the ash-pit, the space or chamber L,

in which the heated products of combustion circulate to heat the base of the stove and pass to the draft or smoke flue, being only around the ash-pit.

' Our third improvementwe carry into practice by casting two rings of circuh r form and of segment or angular form in heir cross. section, as indicated at d d. Between these rings we insert fire-brick sections which are segments of a hollow frusturn of a cone and in their transverse section are in form adapted to the form. of the rings, as .shown. These rings and bricks are firmly riveted together, as illustrated in Fig. 2, and the conic throat thus formed is supported free as to expansion and contraction on a ledge, f, formed on the .part D, as represented. When the throat is placed on the ring, we insert within the coal- 7 supply reservoir, just above it, an inverted frustum of a hollow cone, as shown at g, so

as to ease the descent of the coal and preventof the ordinary poker-hole, N, and have the said extension communicate with the pokehole N','and'therefrom lead down through an extension of the base of the fire-pot or grate into the ash-pit, as represented, so that if a red-hot coal should-be drawn out by the poker it"will, in its passage, fall down through the branch M into the ash-pit.

' Our fifth improvement is carried into practic by casting a hollow or box grate-frame,

- o, with its upper surface inclined. Within t-he center of this frame we set a grate, P. To the front of the frame we attach a handle, Q. From the edges of the frame a flange, h, ex-

tends, and LO the under side of this flange legs i i are fastened. This portable auxiliary grate is set in the place occupied by the ash-pan when it is desired to start a fire in the fire-pot; and whenthus placed the air has a free circulation under it and through the grate, as the bottom of the box-frame iswholly open. The kindling is placed on the grate, and in a very short time after applying the match to it the fire in the stove will be in condition for removing the portable grate, closing the damper I, and replacing the ash-pan. If the kindling were simply placed in the ash-pan, the

starting of the fire would not be so efiectual, as no draft below, it-is obtained, and if the base plate of the stove we're used, then the dis-.

tance would be so great from the main grate that the end desired would be'very imperfectly and slowly attained. It ,is. our intention to use a portable grate which reaches pretty close to the'main grate.

To carry into practice our sixth improve.

ment, we simply have to bore ahole, R, in each side of the ash-pan, as represented, and pro- I vide a poker of a size corresponding to these holes, andof suitable length to reach across the pan.v We draw out the'pan by its .ordi.

nary handle far enough to pass the poker through the'holes, and then lift by and carry the pan on the poker without burning, our hands.

The last three improvements may be considered simple, but they are exceedingiy important in that class of stoves known as base-burners. Ourother improvements are likewise of vital importance, especially the third feature, which obviates that fatal objecti0nviz the tearing asunder'of the parts which support the fire-brick under the intense action of heat.

What we claim as our invention, and as an improvement in baseburning-reservoir-stoves,

is y

1. The combination of the illumination-openings, flame expansion chamber, coalsupply reservoir, fire-pot, descending flue, and draftfiue, substantially in the manner and'fdr the purpose described.

2. The combination with the flame-expansion chamber formed at the base of the coalsupply reservoir and. around the upper edge of the fire-pot of a base-burning stove, of the branch draft-flue with damper, when the same are locatedyiiith respect to the flame-expansion chamber, "fire-pot, coal-supply reservoir, and descending combustion-fines substantially as and for the purpose described.-

v 3. A fire-brick or fire-proof throat fora coalsupply reservoir of base-burning stoves,when such thraat is wholly free, so far as expansion and contraction are concerned, from the diii'en out parts of the stove, and is loosely set upon that portion which sustains it in place, and is constructed of encircling rings of metal and fire-brick or other fire-proof substances, sub.- stantially as described.

P i i for the purpose set forth, and so that side hanaasss 3 4; The branch to the poke-hole, substandles or a bail which is permanently attached tiallyas and for the purpose specified. and liable to become heated may be dispensed 5. The portable auxiliary grate constructed with. and adapted as specified, for use with baseburning reservoir-stoves, in the manner and for the purpose set forth. l

6. Providing the ash-pan with unobstructed WVitnesses holes in its sides about midway of its length, W. W. GRANNELL, WILLIAM G. CARR. 

